20686384

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{839}}^1$

素因数の和:937

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21810896

約数列:

[1, 2, 4, 8, 16, 23, 46, 67, 92, 134, 184, 268, 368, 536, 839, 1072, 1541, 1678, 3082, 3356, 6164, 6712, 12328, 13424, 19297, 24656, 38594, 56213, 77188, 112426, 154376, 224852, 308752, 449704, 899408, 1292899, 2585798, 5171596, 10343192, 20686384]

約数ペア:

[(1, 20686384), (2, 10343192), (4, 5171596), (8, 2585798), (16, 1292899), (23, 899408), (46, 449704), (67, 308752), (92, 224852), (134, 154376), (184, 112426), (268, 77188), (368, 56213), (536, 38594), (839, 24656), (1072, 19297), (1541, 13424), (1678, 12328), (3082, 6712), (3356, 6164)]